{"id":11745,"date":"2013-07-24T21:08:56","date_gmt":"2013-07-24T21:08:56","guid":{"rendered":"http:\/\/www.beautifulwork.org\/?p=11745"},"modified":"2013-07-24T21:08:56","modified_gmt":"2013-07-24T21:08:56","slug":"gcov-test-coverage-program","status":"publish","type":"post","link":"https:\/\/www.trueangle.org\/index.php\/2013\/07\/24\/gcov-test-coverage-program\/","title":{"rendered":"What is gcov which comes with GCC ?"},"content":{"rendered":"

ABOUT gcov<\/u><\/p>\n

\nGcov is a source code coverage analysis and statement-by-statement profiling tool. Gcov generates exact counts of the number of times each statement in a program is executed and annotates source code to add instrumentation. Gcov comes as a standard utility with the GNU Compiler Collection (GCC) suite.[1]\n\nThe gcov utility gives information on how often a program executes segments of code.[2] It produces a copy of the source file, annotated with execution frequencies. The gcov utility does not produce any time-based data and works only on code compiled with the GCC suite. The manual claims it is not compatible with any other profiling or test coverage mechanism,[3] but it works with llvm-generated files, too.\n<\/pre>\n
A TYPICAL SHELL SESSION<\/u>
\n[bash]
\n$ls
\nloop.c
\n$gcc -fprofile-arcs -ftest-coverage loop.c
\n$ls
\na.out  loop.c  loop.gcno
\n$.\/a.out
\n^C
\n$ls
\na.out  loop.c  loop.gcno
\n$gcov loo
\nloop.c     loop.gcno
\n$gcov loop.c
\nloop.gcda:cannot open data file, assuming not executed
\nFile ‘loop.c’
\nNo executable lines
\nRemoving ‘loop.c.gcov’<\/p>\n
$cat loo
\nloop.c     loop.gcno
\n$cat loop.c
\nmain()
\n{
\nfor (;;);
\n}<\/p>\n
$cp \/home\/jeffrin\/loop.c .
\n$cat loop.c
\nmain()
\n{
\nprintf("hello world");
\n}<\/p>\n
$gcc -fprofile-arcs -ftest-coverage loop.c
\nloop.c: In function \u2018main\u2019:
\nloop.c:3:1: warning: incompatible implicit declaration of built-in function \u2018printf\u2019 [enabled by default]
\n$.\/a.out
\nhello world$
\n$gcov loop.c
\nFile ‘loop.c’
\nLines executed:100.00% of 3
\nCreating ‘loop.c.gcov’<\/p>\n
$cat loop.c.gcov
\n        -:    0:Source:loop.c
\n        -:    0:Graph:loop.gcno
\n        -:    0:Data:loop.gcda
\n        -:    0:Runs:1
\n        -:    0:Programs:1
\n        1:    1:main()
\n        -:    2:{
\n        1:    3:printf("hello world");
\n        1:    4:}
\n        -:    5:
\n$<\/p>\n
[\/bash]
\nLINK
\nhttps:\/\/en.wikipedia.org\/wiki\/Gcov<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
ABOUT gcov Gcov is a source code coverage analysis and statement-by-statement profiling tool. Gcov generates exact counts of the number of times each statement in a program is executed and annotates source code to add instrumentation. Gcov comes as a standard utility with the GNU Compiler Collection (GCC) suite.[1] The gcov utility gives information on … <\/p>\n
Continue reading “What is gcov  which comes with GCC ?”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[83],"tags":[552,596,810],"_links":{"self":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/11745"}],"collection":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/comments?post=11745"}],"version-history":[{"count":0,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/11745\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/media?parent=11745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/categories?post=11745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/tags?post=11745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}